Quarterly report pursuant to Section 13 or 15(d)

D. ACCRUED LIABILITIES AND EXPENSES (Details)

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D. ACCRUED LIABILITIES AND EXPENSES (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accrued liabilities and expenses      
Accrued liabilities and expenses $ 371,910 $ 223,011  
Accrued payroll and payroll taxes 402,455 331,908  
Accrued sales taxes, penalties, and interest 129,885 274,869  
Accrued interest 122 253  
Product warranties 93,226 95,540 $ 66,555
Total accrued liabilities and expenses $ 997,598 $ 925,581